In firmware code, you need SSID and Password (i.e Wi-Fi name and password) for internet connection so that collected data can be uploaded to SensorWeb server. Data can be seen as visualization on SensorWeb dashboard.

Also, you need API key and sensor id. Either you can request these from its website by filling contribute form or you can mail them directly with your name, email, location. They will setup a station for you on the dashboard.

Installation and configuration steps for ESP8266 arduino and PM2.5 :-

Wiring connection between PM2.5 and Arduino ESP8266

As you can see in the image : PM2.5 sensor and arduino board. PM2.5 sensor has 8 pins (let’s say, leftmost as 1st and rightmost as 8th pin ). 1st – 2nd are power pins (Vin & GND) while 4th – 5th pins are data pins (Tx & Rx).

Connect 1st pin and 2nd pin of PM2.5 to Vin (+ve) and GND (-ve) of arduino board respectively. You can see in above image : violet color wire for Vin and red color wire for GND.

Connect 4th pin and 5th pin of PM2.5 to Tx and Rx of arduino board respectively.

You are done with wiring connection. Yay! :). All are other pins of PM2.5 are not required now.